RotoTEC® 
The RotoTEC® is a drill pipe deployed tool designed to eliminate casing wear and reduce torque and drag in the drill string.
This tool has a less stiffening effect than rigid sub-based tools, and a modified protector can be manufactured to provide additional Total Flow Area (TFA) should Equivalent Circulating Densities (ECD) become an issue.
Features
High resistance to clamp slippage
Drill pipe protection bearing
Enhanced limited rig capability/reduces stress on surface equipment
Does not increase number of connections in drill string
Reduces drill string drag during lower completion installations i.e. sand screens/liner running